Auxiliary jet cutting tip for cutting torches and method of using same



BER LY 1,791,158

I FOR CU "G c. J. co AUXILIARY JET CUTTING T P TORCHES AND METHOD OF USING SA Filed Sept. 29, 1923 Feb. 3, .1931.

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Patented Feb. 3, 1931 warren sr'rss 1ers;

CLARENCE J. coBER'IiY, oF Los An ennas, oALIroRN -i, AssIGNoR r KOBE, m. ,".or,

Los Anennns, carirronnrn, A oora-ronstrron or oamronnrn AUXILIARY .mr'ou'rrine TIP FOR carriers Toner-ins m), ranrnjonor smegma- Application filed September 2s,'--192s'i seria.1 No. 665,645.

My invention relates to the art of cutting slots in metal plates, and is particularly ap-' plicable to the cutting'of slots in oil well casing. 1

In the production of oil, it is generally necessary to provide a steel. casing or pipe which extends from the surface of the earth down into the oil sands, and which is perforated where it extends into the oil sands with slots suiiiciently'narrow to hold back the coarse sand and gravel surroundnig the pipe, while at thesame time permitting toe oil toflow say, it is desirable to produce a slot having a uniform width at the outer surface; of the pipe, which slot is wider at the inner surface tom of the counterbore portion 18.

of the pipe, it having been found that slots having this shape are less likely to clog up in the operation of the well. lily invention provides a ready means for cuttin slots of this peculiar form in the casing before it is put into the well. I 1 7 Further objects and advantages will be made evident hereinafter.

Referring to the drawing whichis for illustrative purposes only,

Fig. 1 is a cross section through a form of cutting tip adaptedto carry on my invention.

Fig. 2 is a section on a plane represented by the line 2-2 of Fig. 1. I

Fig. 3 is a section of the slot produced.

in the form of invention illustrated in these drawings, 11 is a cutting tip having a conical head 12, which is seated in the torch in the usual manner. The tip 12 is preferably provided with a counterbored orifice 13, extending for a considerable distance into the body of the tip 11, two divergent cutting ori iioes 14: extending downwardly from the bot- Four heating orifices 15 are provided and the torch is so arranged that oxygen is supplied to'the assage 13 and to the orifices 14 and a mixture of combustible gas and oxygen is supplied to .the'heating orifices 15. For cutting ordinary oil well pipe having slots inch wide at the outside and inch wide at the insidezof the casing, I provideheating orifices151which I are .02 linch in diameter and Iprovide cutting orifices 141-, .028'inch indiameter, the an gle betweenthe orifices M'be ing about 7 degrees. Ilhav found,howeve r, thatpthe use of only the two orifices 14; tends to cut in the form sho wn 'in Fig; leaving a tongue or core QOJalOng the middle of the slot! For the purpose of eliminating this core and, thus speeding upthef operation, I provide an orifice 21.which directs the'flame centrally into the slotin the general direction of the dotted-lines 22'of Fig. 3, thus-tending to reduce the core 20. "Bythe use of the auxiliary or core cutting orifice 21, I am able tov economically produce wideslots in ojilwell casing.

Slots having a keystone'ishape" have a special utility inoil well casin'gyas any material passing into the slot through the narrow outer opening will then pass, entirely, through the slot without clogging it. 1 By forming theslots withajet of definite form it is'possible to form a slot of; uniform width and form throughout its length. By adding additional core cutting orifices,

any width of slot desired maybe produced. j

".21 claim as my invention: a p I p 1. The method of' cuttinga slot havinginwardly; and downwardly divergent side walls which comprises: heating the metalto 'be'cut, directing against said metal two cutting jets spaced transversely of the desired slot and relatively diverging outwardly to produce the angled sidewalls of said slot, directing athird cutting et between said two cutting jets to attack the intermediate metal beween said side walls, and moving all of said jets relative to saidnmetal. r

2. The method of cutting a slot having inwardly'and downwardly divergent sidewalls which comprises: heating the metal to be out, directing two relatively diverging cutting jets to attack the metal at pointsxrelatively spaced transversely of the desired slot, directmg an auxiliary cutting jet to attack the metal between said points, and moving all of said ets relative to said metal.

3. A. method of cutting a slot in a metal member, the walls of which slot have a given angular relation, which consists in heating a given area of said metal member, directing a pair of jets through said metal in said heated area, the axes of'said jets belng substantially parallel with the planes of the desired walls of said slot, moving said ets in said heated area to form said Walls and produce a tongue of metal projecting from said metal member between said walls, directing a third jet against said tongue in said heated area and moving said third et in c0njunction with said pair of jets so as to consume said tongue as it is formed.

4. A method of burning a slot in a metal member which consists in heating a given area of said member, burning individual slots in said heated area to form the walls of the aforesaid slot and produce a tongue of metal projecting from said metal member between said walls, and consuming said tongue by burning, as said individual slots are being formed.

5. A method as set forth in claim 4 in which said tongue is consumed in said heated area.

6. The method of cutting a slot having in- Wardly and downwardly divergent side walls which comprises: heating the metal to be cut, directing against said metal two cutting jets which impinge on a line perpendicular to the axis of the desired slot to produce the angled side Walls of said slot, directing a third cutting et between said two cutting jets to attack the intermediate metal between said side walls, and. moving all of said jets relative to said metal.

7. The method of cutting a slot having inwardly and downwardly divergent side walls which comprises: heating the metal to be cut, directing two relatively diverging cutting jets which impinge on a line perpendicular to the axis of the desired slot, directing an auxiliary cutting jet to attack the metal between said side walls, and moving all of said jetsrelative to said metal.

8. The method of cutting a slot having inwardly and downwardly divergent side walls which comprises: heating the metal to be cut, directing two diverging jets with their axes lying in a plane transversely disposed relative to the axis of the slot to form the side walls of said slot and a core of metal in the interior of said slot, directing a jet against said core and moving said last mentioned jet so as to closely follow said diverging jets at a fixed distance therefrom.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 20th day of September, 1923.

CLARENCE J. COBERLY. 

